JP3297587B2

JP3297587B2 - Electric water heater

Info

Publication number: JP3297587B2
Application number: JP08500296A
Authority: JP
Inventors: 佳洋山下; 雅道駒田; 周史佐藤
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1996-04-08
Filing date: 1996-04-08
Publication date: 2002-07-02
Anticipated expiration: 2016-04-08
Also published as: JPH09276145A

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、一般家庭において
湯を沸かし保温する電気湯沸かし器に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater that heats and keeps hot water in an ordinary household.

【０００２】[0002]

【従来の技術】以下に従来構成の電気湯沸かし器につい
て図５を用いて説明する。図５は従来構成の電気湯沸か
し器のブロック図であり、１は水を収容する容器、２は
容器１内の水（以下、単に水と称す）を加熱または所定
温度に維持する熱源たる加熱手段、３は加熱手段２の通
電を制御する通電制御手段、４は温度センサで、加熱手
段２および温度センサ４は容器１の底部に配置されてい
る。５は温度センサ４からの入力に基づいて水の温度を
間接的に検知して温度データとして出力する温度検知手
段、６は沸騰検知手段で、水が沸騰するまで水量に応じ
た一定勾配で上昇する温検知手段５の温度データの上昇
勾配を計測して判定基準勾配として保持し、水が沸騰し
たときに前記温度データの上昇勾配が前記判定基準勾配
に対して所定の割合で緩やかになることより水の沸騰状
態を検知して、水の沸騰を示す沸騰信号を出力する。2. Description of the Related Art A conventional electric water heater will be described below with reference to FIG. FIG. 5 is a block diagram of an electric water heater of a conventional configuration, wherein 1 is a container for storing water, 2 is a heating means as a heat source for heating water in the container 1 (hereinafter simply referred to as water) or maintaining the water at a predetermined temperature; Reference numeral 3 denotes an energization control unit for controlling the energization of the heating unit 2, and 4 denotes a temperature sensor. The heating unit 2 and the temperature sensor 4 are arranged at the bottom of the container 1. 5 is a temperature detecting means for indirectly detecting the temperature of the water based on the input from the temperature sensor 4 and outputting it as temperature data, and 6 is a boiling detecting means, which rises at a constant gradient according to the amount of water until the water boils. The rising slope of the temperature data of the temperature detecting means 5 is measured and held as a determination reference slope, and when water boils, the rising slope of the temperature data becomes gentle at a predetermined rate with respect to the determination reference slope. It detects the boiling state of water and outputs a boiling signal indicating the boiling of water.

【０００３】７は温度低下検知手段で、温度検知手段５
より入力する温度データが温度幅Δθ１（＝２．４℃）
以上低下することを検知して、水の温度低下を示す温度
低下信号を出力する。８は温度未達検知手段で、温度検
知手段５より入力する温度データが温度θ１（＝８６
℃）未満であることを検知して、温度θ１未満であるこ
とを示す温度未達信号を出力する。９は制御手段で、沸
騰検知手段６から沸騰信号を入力するまで加熱手段２を
連続通電させて水を沸騰させる沸騰動作および温度検知
手段５より入力する温度データが温度θ２（＝９１℃＞
θ１）を維持するように加熱手段２を通電制御して沸騰
させた水を温度θ３（＝９５℃）に保温する保温動作か
らなる。[0003] Reference numeral 7 denotes a temperature drop detecting means.
Temperature data to be input is temperature width Δθ1 (= 2.4 ° C.)
Upon detecting the decrease, a temperature decrease signal indicating a decrease in water temperature is output. Numeral 8 denotes a temperature non-attainment detecting means. The temperature data inputted from the temperature detecting means 5 is a temperature θ1 (= 86
° C), and outputs a signal indicating that the temperature is lower than θ1. Numeral 9 denotes a control means. The boiling operation of continuously heating the heating means 2 until a boiling signal is input from the boiling detection means 6 to boil water and the temperature data inputted from the temperature detection means 5 are represented by a temperature θ2 (= 91 ° C.>).
The heating operation is performed by controlling the power supply to the heating means 2 so as to maintain θ1) and keeping the boiled water at a temperature θ3 (= 95 ° C.).

【０００４】そして、制御手段９は、保温動作中に温度
未達検知手段８より温度未達信号を入力すると、加熱手
段２を連続通電して水を短時間で沸騰させるために自動
的に沸騰動作に動作状態を移行し、沸騰検知手段６より
沸騰信号を入力して水の沸騰状態を検知すると保温動作
に状態移行する。[0004] When the control means 9 receives a signal indicating that the temperature has not been reached from the temperature unreached detection means 8 during the warming operation, the heating means 2 is continuously energized to automatically boil water in a short time. The operating state is shifted to the operation, and when the boiling signal is input from the boiling detecting means 6 to detect the boiling state of water, the state shifts to the warming operation.

【０００５】また、制御手段９は沸騰動作中に新たに水
を容器１内に追加する等で温度低下検知手段７より温度
低下信号を入力すると、沸騰検知手段６で追加後の水量
に応じた判定基準勾配を計測し直すように制御して、沸
騰動作中に水を追加しても追加後の水量に応じた精度よ
い沸騰検知を実現する。Further, when the control means 9 inputs a temperature decrease signal from the temperature decrease detection means 7 by, for example, newly adding water to the container 1 during the boiling operation, the boiling detection means 6 adjusts the amount of water after addition. Even if water is added during the boiling operation, accurate boiling detection corresponding to the amount of water after the addition is realized by controlling so that the determination reference gradient is measured again.

【０００６】なお、機器を長時間使用して容器１内側に
水垢等が付着した場合には、水を定格量だけ注ぎ洗浄剤
を添加した後に機器に電源を投入し、沸騰動作または保
温動作を使用者の意志により所定時間行わせることで容
器１を洗浄することができる。[0006] When scale is adhered to the inside of the container 1 after using the apparatus for a long time, the apparatus is turned on after pouring water by a rated amount, adding a cleaning agent, and performing a boiling operation or a heat retaining operation. The container 1 can be cleaned by performing the operation for a predetermined time according to the user's will.

【０００７】[0007]

【発明が解決しようとする課題】しかしながら上記の従
来構成では、容器洗浄を行うときの動作は沸騰動作また
は保温動作との兼用であるために単位時間当たりの洗浄
効率が悪く、また容器洗浄を行うための専用動作モード
を有していないので、洗浄時間は機器を使用する者に依
存し、その洗浄効果に大きなばらつきが発生するという
課題があった。However, in the above-mentioned conventional structure, the operation for cleaning the container is also used as the boiling operation or the heat retaining operation, so that the cleaning efficiency per unit time is poor and the container is cleaned. However, there is a problem that the cleaning time depends on the user of the equipment, and the cleaning effect varies greatly.

【０００８】本発明は上記従来の課題を解決するもの
で、水を沸騰させて沸騰状態を維持する容器洗浄用の動
作モードを備えて洗浄効率を高めるとともに、水の沸騰
直後に冷却期間を設けて蒸気の発生量を抑え安全性を高
めることを目的とする。The present invention has been made to solve the above-mentioned conventional problems, and has an operation mode for cleaning a container in which water is boiled to maintain a boiling state, thereby improving the cleaning efficiency, and providing a cooling period immediately after the boiling of water. To reduce the amount of generated steam and increase safety.

【０００９】また、水を沸騰させて沸騰状態を維持する
容器洗浄用の動作モードにて洗浄効率を高めるととも
に、水の沸騰状態を維持しているときの温度センサ部の
温度変化を水の温度低下と誤検知して動作状態が変化し
てしまうのを防ぐことを目的とする。Further, the cleaning efficiency is improved in a container cleaning operation mode in which the water is boiled and the boiling state is maintained. It is an object of the present invention to prevent an operation state from being changed due to erroneous detection of a decrease.

【００１０】また、容器洗浄用の動作モードで水を沸か
しているときに新たに水を追加しても、水が沸騰してい
ないのに誤って沸騰検知するのを防いで追加後の水を精
度よく沸騰させることを目的とする。Further, even if new water is added while boiling water in the container cleaning operation mode, it is possible to prevent the detection of boiling by mistake when the water is not boiling, and to remove the added water. It aims to boil accurately.

【００１１】また、容器洗浄動作が終了した後に水を容
器外に全部排出しても機器の安全性を確保することを目
的とする。It is another object of the present invention to ensure the safety of equipment even if water is completely drained out of the container after the container washing operation is completed.

【００１２】[0012]

【課題を解決するための手段】上記課題を解決するため
に本発明の電気湯沸かし器は、沸騰検知手段からの入力
信号に基づき容器内の液体を沸騰させる沸騰動作または
温度検知手段からの入力信号に基づき容器内の液体を所
定温度に維持する保温動作からなる通常モードと、前記
通常モードとは別に容器の洗浄を行う容器洗浄モードを
有する制御手段を備え、前記制御手段が、前記容器洗浄
モードでは沸騰検知手段からの入力信号に基づき容器内
の液体の沸騰状態を検知するまで通電制御手段により加
熱手段を動作させ、沸騰検知後は通電制御手段により、
前記液体の沸騰を鎮静化すべく前記加熱手段の通電を所
定時間だけ遮断し、その後連続的または所定周期にて断
続的に通電制御させる構成とする。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an electric water heater according to the present invention uses a boiling operation for boiling a liquid in a container based on an input signal from a boiling detecting means or an input signal from a temperature detecting means. A normal mode consisting of a heat-retention operation for maintaining the liquid in the container at a predetermined temperature, and control means having a container cleaning mode for cleaning the container separately from the normal mode, wherein the control means is in the container cleaning mode. The heating means is operated by the power supply control means until the boiling state of the liquid in the container is detected based on the input signal from the boiling detection means, and after the detection of the boiling, the power supply control means
The energization of soothing all rather the heating means boiling of liquid cut off for a predetermined time, the cross-sectional <br/> arrangement for connection to the energization control by continuously or a predetermined period after it.

【００１３】[0013]

【発明の実施の形態】本発明の請求項１記載の発明は、
液体を収納する容器と、前記容器内の液体を加熱および
所定温度に維持する加熱手段と、前記加熱手段の通電制
御を行う通電制御手段と、温度センサを介して前記容器
内の液体の温度を間接的に検知する温度検知手段と、前
記温度検知手段より入力する温度信号に基づき前記容器
内の液体の沸騰状態を検知する沸騰検知手段と、前記沸
騰検知手段からの入力信号に基づき前記容器内の液体を
沸騰させる沸騰動作または前記温度検知手段からの入力
信号に基づき前記容器内の液体を所定温度に維持する保
温動作からなる通常モードと、前記通常モードとは別に
前記容器の洗浄を行う容器洗浄モードを有する制御手段
を備え、前記制御手段が、前記容器洗浄モードでは前記
沸騰検知手段からの入力信号に基づき前記容器内の液体
の沸騰状態を検知するまで前記通電制御手段により前記
加熱手段を動作させ、沸騰検知後は前記通電制御手段に
より、前記液体の沸騰を鎮静化すべく前記加熱手段の通
電を所定時間だけ遮断し、その後連続的または所定周期
にて断続的に通電制御させる構成とした電気湯沸かし器
とすることにより、容器内の液体の沸騰状態を検知する
までは加熱手段を連続通電させて液体を短時間で沸騰さ
せ、沸騰検知後は断続的に加熱手段を通電させて、液体
の沸騰状態維持や対流による水垢剥離効果等で容器の洗
浄効率を高める。そして、沸騰検知直後に所定時間だけ
加熱手段への通電を遮断して煮えたぎる液体を鎮静化さ
せ、その後に前記断続的に加熱手段を通電させて、液体
を高温状態に維持しつつ発生する蒸気量を抑える。BEST MODE FOR CARRYING OUT THE INVENTION
A container that stores the liquid, a heating unit that heats the liquid in the container and maintains the liquid at a predetermined temperature, an energization control unit that controls energization of the heating unit, and the temperature of the liquid in the container via a temperature sensor. Temperature detecting means for indirectly detecting, boiling detecting means for detecting a boiling state of the liquid in the container based on a temperature signal input from the temperature detecting means, and the inside of the container based on an input signal from the boiling detecting means. A normal mode including a boiling operation for boiling the liquid or a warming operation for maintaining the liquid in the container at a predetermined temperature based on an input signal from the temperature detecting means; and a container for cleaning the container separately from the normal mode. A control unit having a cleaning mode, wherein the control unit detects a boiling state of the liquid in the container based on an input signal from the boiling detection unit in the container cleaning mode. Operating the said heating means by said energization control means to that, the after boiling detected the energization control means, the boiling of the liquid and deenergized soothing all rather before Symbol heating means for a predetermined time, continuously after its Target or predetermined period
By using an electric water heater that is configured to intermittently control the energization, the heating means is continuously energized until the boiling state of the liquid in the container is detected, causing the liquid to boil in a short time, and intermittently after detecting the boiling The heating means is electrically energized to increase the washing efficiency of the container by maintaining the boiling state of the liquid and removing the scale by convection. Immediately after the detection of boiling, the power supply to the heating means is cut off for a predetermined time to calm the boiling liquid, and thereafter the heating means is intermittently supplied with electricity, and the amount of vapor generated while maintaining the liquid at a high temperature state Suppress.

【００１４】また、請求項２記載の発明は、液体を収納
する容器と、前記容器内の液体を加熱および所定温度に
維持する加熱手段と、前記加熱手段の通電制御を行う通
電制御手段と、温度センサを介して前記容器内の液体の
温度を間接的に検知する温度検知手段と、前記温度検知
手段より入力する温度信号に基づき前記容器内の液体の
沸騰状態を検知する沸騰検知手段と、前記温度検知手段
より入力する温度信号に基づき前記容器内の液体の温度
が所定温度幅以上低下することを検知する温度低下検知
手段と、前記沸騰検知手段からの入力信号に基づき前記
容器内の液体を沸騰させる通常モードと、前記通常モー
ドとは別に前記容器の洗浄を行う容器洗浄モードを有す
る制御手段を備え、前記制御手段が、前記通常モードで
は前記温度低下検知手段からの入力信号に基づき前記沸
騰検知手段で前記容器内の液体の沸騰状態を再度検知し
直すように制御し、前記容器洗浄モードでは前記温度低
下検知手段からの入力信号に関わらず動作状態を継続す
る構成とした電気湯沸かし器とすることにより、容器洗
浄モードでは温度低下検知手段からの入力信号に関わら
ず動作状態を継続し、加熱手段の輻射熱による影響等で
液体が沸騰した直後には過度に上昇した温度センサ部の
温度が、液体の沸騰後に加熱手段を断続的に通電させた
場合に下降し安定するのを誤って温度低下と検知して再
度加熱手段を連続通電させるのを防ぐことができる。According to a second aspect of the present invention, there is provided a container for storing a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, Temperature detection means for indirectly detecting the temperature of the liquid in the container via a temperature sensor, and boiling detection means for detecting the boiling state of the liquid in the container based on a temperature signal input from the temperature detection means, A temperature drop detection unit that detects that the temperature of the liquid in the container is reduced by a predetermined temperature range or more based on a temperature signal input from the temperature detection unit; and a liquid in the container based on an input signal from the boiling detection unit. And a control means having a container cleaning mode for cleaning the container separately from the normal mode, wherein the control means detects the temperature drop in the normal mode. Based on an input signal from the means, the boiling detection means controls the boiling state of the liquid in the container again to be detected again.In the container cleaning mode, the operation state is controlled regardless of the input signal from the temperature decrease detection means. By using an electric water heater having a continuous configuration, in the container cleaning mode, the operation state is continued irrespective of the input signal from the temperature decrease detecting means, and immediately after the liquid boils due to the influence of radiant heat of the heating means, etc. It is possible to prevent the temperature of the raised temperature sensor unit from dropping and stabilizing when the heating means is intermittently energized after the boiling of the liquid, erroneously detecting that the temperature has dropped, and preventing the heating means from being continuously energized again. it can.

【００１５】また、請求項３記載の発明は、液体を収納
する容器と、前記容器内の液体を加熱および所定温度に
維持する加熱手段と、前記加熱手段の通電制御を行う通
電制御手段と、温度センサを介して前記容器内の液体の
温度を間接的に検知する温度検知手段と、前記温度検知
手段より入力する温度信号に基づき前記容器内の液体の
沸騰状態を検知する沸騰検知手段と、前記温度検知手段
より入力する温度信号に基づき前記容器内の液体の温度
が所定温度幅以上低下することを検知する温度低下検知
手段と、前記沸騰検知手段からの入力信号に基づき前記
容器内の液体を沸騰させる通常モードと、前記通常モー
ドとは別に前記容器の洗浄を行う容器洗浄モードを有す
る制御手段を備え、前記制御手段が、前記容器洗浄モー
ドでは前記沸騰検知手段からの入力信号に基づき前記容
器内の液体の沸騰状態を検知するまで前記通電制御手段
により前記加熱手段を動作させ、沸騰検知後は前記通電
制御手段により前記加熱手段を連続的または断続的に通
電制御させる構成において、前記沸騰状態を検知するま
では前記温度低下検知手段からの入力信号に基づき前記
沸騰検知手段で前記容器内の液体の沸騰状態を再度検知
し直すように制御し、前記沸騰検知後は前記温度低下検
知手段からの入力信号に関わらず前記加熱手段の連続的
または断続的な通電制御状態を継続するようにした電気
湯沸かし器とすることにより、容器洗浄モードにて、加
熱手段を連続通電させて容器内の液体を加熱していると
きに新たに液体を追加しても、制御手段が温度低下検知
手段からの入力信号に基づき容器内の液体の温度低下を
検知し、沸騰検知手段で沸騰検知を再度やり直すように
制御して、追加後の液体量に応じた精度よい沸騰検知を
行うことができる。そして、沸騰検知後は温度低下検知
手段からの入力信号に関わらず動作状態を継続し、過度
に上昇した温度センサ部の温度が下降し安定するのを誤
って温度低下と誤検知し再度加熱手段を連続通電させる
のを防ぐことができる。The invention according to a third aspect of the present invention provides a container for storing a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, Temperature detection means for indirectly detecting the temperature of the liquid in the container via a temperature sensor, and boiling detection means for detecting the boiling state of the liquid in the container based on a temperature signal input from the temperature detection means, A temperature drop detection unit that detects that the temperature of the liquid in the container is reduced by a predetermined temperature range or more based on a temperature signal input from the temperature detection unit; and a liquid in the container based on an input signal from the boiling detection unit. And a control unit having a container cleaning mode for cleaning the container separately from the normal mode, wherein the control unit performs the boiling detection in the container cleaning mode. The heating means is operated by the power supply control means until the boiling state of the liquid in the container is detected based on an input signal from the means, and after the detection of boiling, the heating means is continuously or intermittently controlled by the power supply control means. In the configuration in which the energization is controlled, control is performed such that the boiling state of the liquid in the container is detected again by the boiling detection section based on an input signal from the temperature decrease detection section until the boiling state is detected, After the detection, by using an electric water heater configured to continue the continuous or intermittent energization control state of the heating unit irrespective of the input signal from the temperature decrease detection unit, the heating unit is operated in the container cleaning mode. Even if a new liquid is added while the liquid in the container is being heated by continuous energization, the control means detects the temperature of the It detects the temperature drop of the liquid is controlled to repeat the boiling detection boiling detection means again, it is possible to perform accurate boiling detection in accordance with the amount of liquid after the addition. After the boiling is detected, the operation state is continued irrespective of the input signal from the temperature decrease detecting means, and the temperature of the temperature sensor portion which has excessively risen falls and stabilizes erroneously as a temperature decrease, and the heating means is again detected. Can be prevented from being continuously energized.

【００１６】また、請求項４記載の発明は、液体を収納
する容器と、前記容器内の液体を加熱および所定温度に
維持する加熱手段と、前記加熱手段の通電制御を行う通
電制御手段と、温度センサを介して前記容器内の液体の
温度を間接的に検知する温度検知手段と、前記温度検知
手段より入力する温度信号に基づき前記容器内の液体の
沸騰状態を検知する沸騰検知手段と、前記温度検知手段
より入力する温度信号に基づき前記容器内の液体の温度
が所定温度未満であることを検知する温度未達検知手段
と、前記沸騰検知手段からの入力信号に基づき前記容器
内の液体を沸騰させる沸騰動作および前記温度検知手段
からの入力信号に基づき前記容器内の液体を所定温度に
維持させる保温動作からなる通常モードと、前記通常モ
ードとは別に前記容器の洗浄を行う容器洗浄モードを有
する制御手段を備え、前記制御手段が、前記通常モード
では前記温度未達検知手段からの入力信号に基づき前記
保温動作から前記沸騰動作に状態移行し、前記容器洗浄
モードでは前記温度未達検知手段からの入力信号に関わ
らず動作状態を継続する構成とした電気湯沸かし器とし
ているので、通常モードの保温動作中に新たに液体を追
加する等で温度未達検知手段からの入力信号に基づき容
器内の液体の温度低下を検知すると、沸騰動作に状態移
行して加熱手段を通電開始し温度低下した液体を沸騰さ
せることができるとともに、容器洗浄モードのときは温
度未達検知手段からの入力信号に関わらず動作状態を継
続し、容器洗浄モードが容器内の液体を沸騰させて所定
時間沸騰状態を維持した後に所定温度に保温維持する行
程で構成されている場合において、前記保温維持中に機
器に通電したまま液体を容器外へ排出し温度センサ部の
温度が低下しても加熱手段が通電開始して容器底部が過
度に加熱されるのを防ぐことができる。Further, according to the present invention, there is provided a container for storing a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, Temperature detection means for indirectly detecting the temperature of the liquid in the container via a temperature sensor, and boiling detection means for detecting the boiling state of the liquid in the container based on a temperature signal input from the temperature detection means, A temperature under-detection detecting means for detecting that the temperature of the liquid in the container is lower than a predetermined temperature based on a temperature signal input from the temperature detecting means, and a liquid in the container based on an input signal from the boiling detecting means A normal mode consisting of a boiling operation for boiling water and a warming operation for maintaining the liquid in the container at a predetermined temperature based on an input signal from the temperature detecting means, and the normal mode separately from the normal mode. Control means having a container washing mode for washing the vessel, wherein the control means shifts from the heat-retention operation to the boiling operation based on an input signal from the temperature-unreached detection means in the normal mode, In the cleaning mode, the electric water heater is configured to continue the operation state irrespective of the input signal from the temperature non-reaching detecting means, so that the temperature non-reaching detecting means is newly added during the warming operation in the normal mode. When the temperature drop of the liquid in the container is detected based on the input signal from the controller, the state shifts to the boiling operation, and the heating means can be energized to boil the liquid whose temperature has dropped. The operation state is continued irrespective of the input signal from the attainment detection means, and the container washing mode boils the liquid in the container and maintains the boiling state for a predetermined time and then at a predetermined temperature. In the case where the temperature is maintained, the liquid is discharged to the outside of the container while the power is supplied to the apparatus during the temperature maintenance, and even if the temperature of the temperature sensor unit decreases, the heating means starts to supply power and the bottom of the container is maintained. Excessive heating can be prevented.

【００１７】[0017]

【実施例】（実施例１）以下本発明の第１の実施例について、図１を参照しなが
ら説明する。図１は本発明の第１の実施例における電気
湯沸かし器のブロック図を示したものである。なお、本
実施例において、図５に示す従来例と同じ機能を有する
ものは同一の符号を付し説明を省略する。本実施例の特
徴的構成は、タクトスイッチ等で構成され容器洗浄モー
ドの開始および停止を入力する容器洗浄入力手段１０
と、ＬＥＤ等で構成され容器洗浄モードが動作中である
ことを表示する容器洗浄表示手段１１を新たに設けて、
制御手段９が通常モードとは別に容器１の洗浄を行うた
めの専用モードとして容器洗浄モードを備え、容器洗浄
入力手段１０からの入力信号により容器洗浄モードを動
作開始し容器洗浄表示手段１１を制御して容器洗浄モー
ド中であることを表示し、前記容器洗浄モードでは沸騰
検知手段６から沸騰信号を入力するまで加熱手段２を連
続通電させ、前記沸騰信号を入力すると時間Ｔ１（＝３
０秒）だけ加熱手段２をオフし、その後に時間Ｔ２（＝
１５分）だけ所定周期（＝８秒オン２２秒オフ）にて加
熱手段２をオンオフ制御するように通電制御手段３を制
御する構成としたことである。(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block diagram showing an electric water heater according to a first embodiment of the present invention. In the present embodiment, components having the same functions as those of the conventional example shown in FIG. The characteristic configuration of the present embodiment is that the container cleaning input means 10 is configured by a tact switch or the like and inputs the start and stop of the container cleaning mode.
And a new container washing display means 11 constituted by an LED or the like and displaying that the container washing mode is in operation,
The control means 9 includes a container cleaning mode as a dedicated mode for cleaning the container 1 separately from the normal mode, and starts the container cleaning mode in response to an input signal from the container cleaning input means 10 to control the container cleaning display means 11. To indicate that the vessel is in the container cleaning mode. In the vessel cleaning mode, the heating means 2 is continuously energized until a boiling signal is input from the boiling detection means 6, and when the boiling signal is input, time T1 (= 3)
0 second), the heating means 2 is turned off for a time T2 (=
(15 minutes) for a predetermined period (= 8 seconds on 22 seconds off).

【００１８】以上のように構成された電気湯沸かし器に
ついて、図２を用いてその動作を説明する。図２は本発
明の第１の実施例における容器洗浄モードの動作を示す
図である。機器の動作状態が、従来例に示す沸騰検知手
段６から沸騰信号を入力するまで加熱手段２を連続通電
させて水を沸騰させる沸騰動作および温度検知手段５よ
り入力する温度データが温度θ２（＝９１℃）を維持す
るように加熱手段２を通電制御して沸騰させた水を保温
する保温動作からなる通常モードにあるときに容器洗浄
入力手段１０であるタクトスイッチを押して信号を入力
すると、制御手段９は通常モードから容器洗浄モードへ
モードを変更して容器洗浄表示手段１１であるＬＥＤを
点灯させ、図２に示すようにまず加熱手段２を連続通電
させて水を沸騰させる連続加熱工程の動作を行う。The operation of the electric water heater configured as described above will be described with reference to FIG. FIG. 2 is a diagram showing the operation in the container cleaning mode in the first embodiment of the present invention. The operating state of the equipment is such that the heating means 2 is continuously energized until a boiling signal is input from the boiling detection means 6 shown in the conventional example to boil water, and the temperature data input from the temperature detection means 5 is the temperature θ2 (= When a signal is input by pressing the tact switch, which is the container washing input means 10, in the normal mode including a heat retaining operation for keeping the boiling water warm by heating the heating means 2 so as to maintain the temperature at 91 ° C.). The means 9 changes the mode from the normal mode to the container washing mode, turns on the LED which is the container washing display means 11, and first, as shown in FIG. Perform the operation.

【００１９】そして、水が沸騰し、図２のａ点にて制御
手段９が沸騰検知手段６より沸騰信号を入力すると、Ｔ
１だけ加熱手段２をオフする鎮静化工程へと移行して沸
騰直後の水を鎮静化させる。さらに、Ｔ１経過すると、
所定周期で加熱手段２をオンオフ制御するオンオフ加熱
工程へ移行して水を断続沸騰させ、Ｔ２経過すると容器
洗浄モードの全行程を終了する。Then, when the water boils and the control means 9 inputs a boiling signal from the boiling detecting means 6 at a point a in FIG.
The process shifts to a calming step of turning off the heating means 2 by 1 to calm water immediately after boiling. Further, when T1 elapses,
The process shifts to an on / off heating step of controlling the heating means 2 to be turned on / off in a predetermined cycle, and water is intermittently boiled. When T2 elapses, the entire process of the container cleaning mode ends.

【００２０】以上のような構成により、制御手段９が容
器洗浄モードを動作させ、鎮静化工程で沸騰直後の水を
鎮静化した後にオンオフ加熱工程で水を断続沸騰させる
ことにより、オンオフ加熱工程中に発生する蒸気量を抑
えながら、オンオフ加熱工程での水の沸騰状態維持や対
流による水垢剥離効果等で容器の洗浄効率を高めること
ができる。With the above-described configuration, the control means 9 operates the container cleaning mode, intermittently boil water in the on-off heating step after calming the water immediately after the boiling in the calming step, and thereby, during the on-off heating step. While suppressing the amount of steam generated during the heating, it is possible to enhance the washing efficiency of the container by maintaining the boiling state of water in the on-off heating step and removing the scale by convection.

【００２１】なお、実施例１において、加熱手段２をオ
フする鎮静化工程と加熱手段２を所定周期でオンオフ制
御するオンオフ加熱工程を別々に設けているが、オンオ
フ加熱工程にて加熱手段２のオンオフ制御をオフから開
始する（２２秒オフ８秒オン）ようにして、最初のオフ
期間（２２秒）で鎮静化工程を兼ねる構成にしても同様
の結果を得ることができる。In the first embodiment, the calming step for turning off the heating means 2 and the on-off heating step for controlling the heating means 2 to be turned on and off at predetermined intervals are separately provided. A similar result can be obtained even if the on / off control is started from off (22 seconds off, 8 seconds on) and the calming process is also used in the first off period (22 seconds).

【００２２】（実施例２）以下本発明の第２の実施例について、図１を参照しなが
ら説明する。前記第１の実施例と異なる点は、制御手段
９が、通常モードの沸騰動作のときに温度低下検知手段
７から温度低下信号を入力すると沸騰検知手段６で判定
基準勾配を計測し直すように制御し、容器洗浄モードの
ときに温度低下検知手段７から温度低下信号を入力して
も連続加熱工程からオンオフ加熱工程の動作状態を継続
する構成としたことである。(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIG. The difference from the first embodiment is that the control means 9 re-measures the determination reference gradient by the boiling detection means 6 when the temperature reduction signal is input from the temperature reduction detection means 7 during the boiling operation in the normal mode. In other words, the operation state of the on-off heating process from the continuous heating process is continued even if a temperature decrease signal is input from the temperature decrease detection means 7 in the container cleaning mode.

【００２３】前記第１の実施例において、容器洗浄モー
ドの連続加熱工程にて２〜４リットル程度の低温（２０
℃）の水を加熱すると、容器１底部に配置されている加
熱手段２の発する輻射熱の影響が積算されて、水が沸騰
したときの温度センサ４の温度は水の温度（１００℃）
に対して２〜５℃程度高くなる。そして、鎮静化工程お
よびオンオフ加熱工程では温度センサ４の温度は水の温
度に収束しようと低下し、やがて水の温度に一致する。
したがって、温度低下検知手段７での温度幅Δθ１を比
較的小さな値に設定すると、前記に示した鎮静化工程ま
たはオンオフ加熱工程での温度センサ４温度の収束動作
中に温度低下検知手段７は温度低下を検知して温度低下
信号を出力し、制御手段９は温度低下信号を入力して水
追加による温度低下と誤検知し、加熱手段２を連続通電
するために動作状態を連続加熱工程に戻すとともに、沸
騰検知手段６で再度沸騰検知し直すように制御してしま
う。また、これを防ぐためにΔθ１を大きくすると温度
低下の検知精度が悪化してしまうという課題がある。In the first embodiment, the low temperature (20 to 4 liters)
C.), the influence of the radiant heat generated by the heating means 2 disposed at the bottom of the container 1 is integrated, and the temperature of the temperature sensor 4 when the water boils is the temperature of the water (100 ° C.).
About 2 to 5 ° C. Then, in the calming step and the on / off heating step, the temperature of the temperature sensor 4 decreases to converge to the temperature of the water, and eventually coincides with the temperature of the water.
Therefore, if the temperature width Δθ1 of the temperature drop detecting means 7 is set to a relatively small value, the temperature drop detecting means 7 will be operated during the convergence operation of the temperature sensor 4 in the above-described calming step or on-off heating step. The control means 9 receives the temperature decrease and outputs a temperature decrease signal, and the control means 9 inputs the temperature decrease signal and erroneously detects the temperature decrease due to the addition of water, and returns the operation state to the continuous heating step in order to continuously energize the heating means 2. At the same time, the control is performed so that the boiling detection means 6 detects the boiling again. Further, if Δθ1 is increased to prevent this, there is a problem that the detection accuracy of the temperature drop is deteriorated.

【００２４】本発明はこのような課題を改善するもので
あり、以上のように構成された電気湯沸かし器につい
て、図３を用いてその動作を説明する。図３は容器洗浄
モードにおける容器１内の水および温度センサ４の温度
変化を示す図である。通常モードの沸騰動作のときに新
たに水を容器１内に追加すると、温度低下検知手段７が
温度検知手段５から入力する温度データにより容器１内
の水の温度低下を検知して温度低下信号を出力し、制御
手段９が温度低下検知手段７より温度低下信号を入力し
て沸騰検知手段６で追加後の水量に応じた判定基準勾配
を計測し直すように制御する。The present invention is intended to solve such a problem, and the operation of the electric water heater configured as described above will be described with reference to FIG. FIG. 3 is a diagram illustrating changes in the temperature of the water in the container 1 and the temperature sensor 4 in the container cleaning mode. When water is newly added to the vessel 1 during the boiling operation in the normal mode, the temperature drop detecting means 7 detects the temperature drop of the water in the vessel 1 based on the temperature data input from the temperature detecting means 5, and outputs a temperature drop signal. Is output, and the control means 9 controls so that the temperature decrease signal is inputted from the temperature decrease detection means 7 and the boiling detection means 6 again measures the determination reference gradient according to the added water amount.

【００２５】また、容器洗浄モードの鎮静化工程または
オンオフ加熱工程では、温度低下検知手段７が図３のａ
点での温度センサ４のピーク温度に対し図３のｂ点でΔ
θ１温度低下したのを検知して温度低下信号を出力する
が、制御手段９は温度低下検知手段７から温度低下信号
を入力してもそのときの動作状態を継続するので、連続
加熱工程に戻って加熱手段２を連続通電することはな
い。In the calming step or the on / off heating step in the container cleaning mode, the temperature drop detecting means 7 is used as shown in FIG.
Δ at point b in FIG. 3 with respect to the peak temperature of temperature sensor 4 at point
The controller 9 detects that the temperature has decreased by θ1 and outputs a temperature decrease signal. However, even if the control means 9 receives the temperature decrease signal from the temperature decrease detection means 7, the operating state at that time is continued. Thus, the heating means 2 is not continuously energized.

【００２６】以上のような構成により、温度低下検知手
段７の働きにより、制御手段９は通常モードの沸騰動作
のときには新たな水の追加を検知して追加後の水を精度
よく沸騰させるための処置を施すことができるととも
に、容器洗浄モードのときには温度センサ４の温度が下
降し安定するのを誤って温度低下と判断し制御手段９が
行程を変更するのを防ぐことができる。With the above-described configuration, the control means 9 detects the addition of new water during the normal mode of boiling operation by the operation of the temperature drop detection means 7 and accurately boiles the water after the addition. In addition to taking measures, it is possible to prevent the control means 9 from changing the stroke by erroneously determining that the temperature of the temperature sensor 4 has fallen and stabilized in the container cleaning mode as a temperature decrease.

【００２７】（実施例３）以下本発明の第３の実施例について、図１を参照しなが
ら説明する。前記第２の実施例と異なる点は、制御手段
９が、容器洗浄モードの連続加熱工程のときに温度低下
検知手段７から温度低下信号を入力すると沸騰検知手段
６で判定基準勾配を計測し直すように制御し、鎮静化工
程およびオンオフ加熱工程のときに温度低下検知手段７
から温度低下信号を入力してもそのときの動作状態を継
続する構成としたことである。Embodiment 3 Hereinafter, a third embodiment of the present invention will be described with reference to FIG. The difference from the second embodiment is that when the control means 9 inputs a temperature decrease signal from the temperature decrease detection means 7 during the continuous heating step in the container washing mode, the boiling detection means 6 again measures the determination reference gradient. Temperature drop detecting means 7 during the calming step and the on-off heating step.
The operation state at that time is continued even if the temperature decrease signal is input from the controller.

【００２８】前記第２の実施例において、容器洗浄モー
ドの連続加熱工程で水を沸かしているときに新たに水を
容器１内に追加すると、温度センサ４の温度が低下し上
昇しなくなるのを沸騰検知手段６が温度検知手段５の温
度データの上昇勾配が判定基準勾配に対し極端に緩やか
になったと判断して誤って沸騰検知してしまう、または
追加する前の水量に応じた判定基準勾配を基に沸騰検知
動作を行って追加後の水量が増加した水の温度変化の揺
らぎに対して誤って沸騰検知してしまうという課題があ
る。In the second embodiment, if water is newly added to the container 1 while the water is being boiled in the continuous heating step of the container washing mode, the temperature of the temperature sensor 4 is reduced and does not rise. The boiling detecting means 6 judges that the rising gradient of the temperature data of the temperature detecting means 5 has become extremely gentle with respect to the judging reference gradient and erroneously detects the boiling, or the judging reference gradient according to the amount of water before adding. There is a problem that the boiling detection is performed erroneously with respect to the fluctuation of the temperature change of the water in which the amount of water after the addition is increased based on the above.

【００２９】本発明はこのような課題を改善するもので
あり、以上のように構成された電気湯沸かし器につい
て、図３および図４を用いてその動作を説明する。図４
は容器洗浄モードの連続加熱工程中に水を追加したとき
の動作を示す図である。容器洗浄モードの連続加熱工程
にて判定基準勾配＝勾配Ａとして設定しているときに図
４のａ点で新たに水を容器１内に追加すると、温度低下
検知手段７は図４のｂ点で温度検知手段５から入力する
温度データがΔθ１（＝２．４℃）低下するのを検知し
て温度低下信号を出力し、制御手段９が温度低下検知手
段７より温度低下信号を入力して沸騰検知手段６で追加
後の水量に応じた判定基準勾配を計測し直すように制御
し、沸騰検知手段６は新たに判定基準勾配＝勾配Ｂとし
て設定する。The present invention is intended to solve such a problem, and the operation of the electric water heater configured as described above will be described with reference to FIGS. FIG.
FIG. 7 is a diagram showing an operation when water is added during a continuous heating step in the container cleaning mode. When water is newly added into the container 1 at the point a in FIG. 4 when the determination reference gradient is set as the gradient A in the continuous heating step of the container cleaning mode, the temperature drop detecting means 7 is set to the point b in FIG. Detects that the temperature data input from the temperature detection means 5 has decreased by Δθ1 (= 2.4 ° C.), outputs a temperature reduction signal, and the control means 9 inputs the temperature reduction signal from the temperature reduction detection means 7 The boiling detection means 6 controls so as to re-measure the determination reference gradient according to the amount of water after the addition, and the boiling detection means 6 newly sets the determination reference gradient = gradient B.

【００３０】また、容器洗浄モードの鎮静化工程および
オンオフ加熱工程では、実施例２において図３を用いて
説明したように、温度低下検知手段７から温度低下信号
を入力してもそのときの動作状態を継続し、連続加熱工
程に戻って加熱手段２を連続通電することなく鎮静化工
程またはオンオフ加熱工程の動作を継続する。Further, in the calming step and the on / off heating step in the container cleaning mode, as described with reference to FIG. 3 in the second embodiment, even if the temperature drop signal is input from the temperature drop detecting means 7, the operation at that time is performed. The state is continued, and the operation of the calming step or the on-off heating step is continued without returning to the continuous heating step and continuously energizing the heating means 2.

【００３１】以上のような構成により、容器洗浄モード
の鎮静化工程またはオンオフ加熱工程のときに温度セン
サ４の温度が下降し安定するのを温度低下検知手段７が
誤って温度低下と判断し制御手段９が行程を変更するの
を防ぐとともに、容器洗浄モードの連続加熱工程で水を
沸かしているときに新たに水を容器１内に追加しても制
御手段９が追加後の水を精度よく沸騰させるための処置
を施すことができる。With the above configuration, the temperature drop detecting means 7 mistakenly determines that the temperature of the temperature sensor 4 drops and stabilizes during the calming step or the on-off heating step in the container washing mode and determines that the temperature has dropped. In addition to preventing the means 9 from changing the stroke, the control means 9 accurately removes the added water even if new water is added to the container 1 while the water is being boiled in the continuous heating step of the container washing mode. Actions can be taken to bring it to a boil.

【００３２】（実施例４）以下本発明の第４の実施例について、図１を参照しなが
ら説明する。前記第１の実施例と異なる点は、容器洗浄
モードのオンオフ加熱工程が終了した後に温度検知手段
５より入力する温度データが温度θ４（＝９１℃＞θ
１）を維持するように加熱手段２を通電制御して水を温
度θ５（＝９５℃）に保温する保温動作である保温動作
工程を追加し、制御手段９は、保温動作工程のときは連
続加熱工程、鎮静化工程、オンオフ加熱工程とは異なる
制御方法（ＬＥＤを点滅させる等）で容器洗浄表示手段
１１を駆動し、保温動作工程中に温度未達検知手段８よ
り温度未達信号を入力しても動作を継続する構成とした
ことである。Embodiment 4 Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. The difference from the first embodiment is that the temperature data input from the temperature detecting means 5 after the on / off heating step of the container cleaning mode is completed is a temperature θ4 (= 91 ° C.> θ).
In order to maintain the condition (1), the heating means 2 is energized to add a heat keeping operation step of keeping the water at a temperature θ5 (= 95 ° C.). The container cleaning display means 11 is driven by a control method (such as blinking an LED) different from the heating step, the calming step, and the on / off heating step, and a temperature unreached signal is input from the temperature unreached detection means 8 during the warming operation step. That is, the operation is continued.

【００３３】保温動作工程を追加した目的は、全工程を
終了し容器洗浄が完了したことを機器を使用する者に知
らせて水を容器１外に排出するよう促すとともに、水が
排出されるまで水を高温状態に維持して更に容器洗浄効
果を高めるためである。The purpose of adding the warming operation step is to inform the user of the equipment that all the steps have been completed and the washing of the container has been completed, to urge the user to drain the water out of the container 1, and to wait until the water is drained. This is for maintaining the water at a high temperature to further enhance the container cleaning effect.

【００３４】しかし、前記第１の実施例に保温動作工程
を追加した場合、保温動作工程で水をθ５に保温維持し
ているときに機器に電源を投入したまま水を容器１外に
全部排出すると容器１底部が外気に触れて急速に温度低
下し、温度未達検知手段８は温度検知手段５で検知する
温度センサ４の温度がθ１未満になるのを検知して温度
未達信号を出力し、制御手段９は温度未達検知手段８よ
り温度未達信号を入力して加熱手段２を連続通電させ容
器１底部を過度に加熱してしまう。However, when the heat retaining operation step is added to the first embodiment, the water is entirely discharged out of the container 1 while the power is turned on while the water is kept at θ5 in the heat retaining operation step. Then, the temperature of the temperature sensor 4 detected by the temperature detecting means 5 becomes lower than θ1, and the temperature non-reaching signal is output. However, the control means 9 inputs a signal indicating that the temperature has not been reached from the temperature unreached detection means 8 to continuously energize the heating means 2 and excessively heat the bottom of the container 1.

【００３５】そこで、通常モードの保温動作中に容器１
内に新たに水を追加する等によって水の温度が低下する
と、温度未達検知手段８が温度センサ４の温度に基づく
温度検知手段５の温度データがθ１未満になったことを
検知して温度未達信号を出力し、制御手段９が温度未達
検知手段８より温度未達信号を入力して動作状態を保温
動作から加熱手段２を連続通電させる沸騰動作に移行す
るようにしたものである。Therefore, during the warming operation in the normal mode, the container 1
When the temperature of the water decreases due to the addition of new water, the temperature-incomplete detection means 8 detects that the temperature data of the temperature detection means 5 based on the temperature of the temperature sensor 4 has become less than θ1, An unreached signal is output, and the control means 9 receives the undelivered temperature signal from the unreached temperature detecting means 8 to shift the operation state from the warming operation to the boiling operation of continuously energizing the heating means 2. .

【００３６】また、容器洗浄モードの保温動作工程のと
きに水を容器１外に全部排出する等によって容器１底部
の温度が低下しても、温度未達検知手段８は温度センサ
４の温度に基づく温度検知手段５の温度データがθ１未
満になったことを検知して温度未達信号を出力するが、
制御手段９は温度未達検知手段８より温度未達信号を入
力しても保温動作工程のθ５保温維持動作を継続するの
で、容器１底部の温度はθ５近傍（＜１００℃）に収ま
る。In addition, even if the temperature at the bottom of the container 1 is lowered by, for example, discharging all of the water out of the container 1 during the warming operation process in the container cleaning mode, the temperature non-reaching detecting means 8 keeps the temperature of the temperature sensor 4 Temperature detection means 5 detects that the temperature data has become less than θ1, and outputs a temperature-unreached signal.
Even if the control means 9 receives the signal indicating that the temperature has not been reached from the temperature unreached detection means 8, the temperature maintaining operation of the temperature maintaining operation process is continued in the temperature maintaining operation step, so that the temperature at the bottom of the container 1 stays near θ5 (<100 ° C.).

【００３７】以上のような構成により、通常モードの保
温動作のときは、新たに水を追加する等により水の温度
が低下したことを検知して自動的に沸騰動作に移行し加
熱手段２を連続通電させて温度低下した水を効率よく沸
かすことができるとともに、容器洗浄が終了し機器に電
源を投入したまま水を容器１外に全部排出しても、加熱
手段２は連続通電を開始することなく、加熱手段２の発
する熱により容器１底部が過度に加熱されるのを防ぐこ
とができる。With the above-described configuration, during the warming operation in the normal mode, it is detected that the temperature of the water has dropped due to the addition of new water or the like, and the operation automatically shifts to the boiling operation and the heating means 2 is turned on. The heating means 2 starts continuous energization even if the water whose temperature has been lowered by the continuous energization can be efficiently boiled and the water is completely discharged out of the container 1 while the container washing is completed and the power is turned on to the apparatus. Without this, it is possible to prevent the bottom of the container 1 from being excessively heated by the heat generated by the heating means 2.

【００３８】なお、実施例４において、保温動作工程で
の制御温度θ４と通常モードの保温動作での制御温度θ
２は、同一値または相違なる値の如何を問わず同様の効
果を得ることができる。また、θ４＝θ２として保温動
作工程での加熱手段２の通電制御アルゴリズムを通常モ
ードの保温動作での加熱手段２の通電制御アルゴリズム
と兼用する構成とすることにより、同様の効果を得つつ
制御手段９の構成を簡単にすることができる。In the fourth embodiment, the control temperature θ4 in the heat retaining operation process and the control temperature θ in the normal mode
2 can obtain the same effect irrespective of the same value or a different value. In addition, by setting θ4 = θ2 and making the energization control algorithm of the heating means 2 in the warming operation process also used as the energization control algorithm of the heating means 2 in the normal mode warming operation, the control means can obtain the same effect as above. 9 can be simplified.

【００３９】また、従来例および実施例１〜実施例４に
おいて、制御手段９は加熱手段２を連続通電させて通常
モードの沸騰動作または容器洗浄モードの連続加熱工程
を行っているが、容器１の温度に対し温度センサ４の温
度の追従性を良くするために最初に加熱手段２の通電を
オンオフさせ、その後に加熱手段２を連続通電させる等
の特定の加熱手段２の通電制御を盛り込んだ場合にも同
様の効果を得ることができる。In the conventional example and the first to fourth embodiments, the control means 9 performs the normal mode boiling operation or the continuous washing step in the container washing mode by continuously energizing the heating means 2. In order to improve the follow-up of the temperature of the temperature sensor 4 with respect to the temperature, the energization control of the specific heating means 2 such as turning on / off the energization of the heating means 2 first and then continuously energizing the heating means 2 is included. In this case, the same effect can be obtained.

【００４０】また、制御手段９は容器洗浄モードのオン
オフ加熱工程において加熱手段２の通電を所定周期でオ
ンオフ制御しているが、加熱手段２を連続通電させた場
合にも同様の効果を得ることができる。The control means 9 controls the energization of the heating means 2 on and off at a predetermined cycle in the on / off heating step of the container cleaning mode. However, the same effect can be obtained even when the heating means 2 is energized continuously. Can be.

【００４１】さらに、温度検知手段５、沸騰検知手段
６、温度低下検知手段７、温度未達検知手段８、および
制御手段９の一部あるいは全部の構成手段をマイクロコ
ンピュータにて行うことができることは明らかである。Further, it is possible that some or all of the components of the temperature detecting means 5, the boiling detecting means 6, the temperature drop detecting means 7, the under temperature detecting means 8, and the control means 9 can be performed by a microcomputer. it is obvious.

【００４２】[0042]

【発明の効果】以上のように、請求項１記載の発明によ
れば、沸騰検知手段からの入力信号に基づき容器内の液
体を沸騰させる沸騰動作または温度検知手段からの入力
信号に基づき前記容器内の液体を所定温度に維持する保
温動作からなる通常モードとは別に前記容器の洗浄を行
う容器洗浄モードを有する制御手段を備え、前記制御手
段が、前記容器洗浄モードでは前記沸騰検知手段からの
入力信号に基づき前記容器内の液体の沸騰状態を検知す
るまで通電制御手段により加熱手段を動作させ、沸騰検
知後は前記通電制御手段により、前記液体の沸騰を鎮静
化すべく前記加熱手段の通電を所定時間だけ遮断し、そ
の後連続的または所定周期にて断続的に通電制御させる
構成により、容器洗浄モードで容器の洗浄効率を高め洗
浄性能を均一化するとともに、蒸気の発生量を抑えて機
器の安全性を高めることができる。As described above, according to the first aspect of the present invention, the container is boiled based on an input signal from the boiling detecting means or a boiling operation for boiling the liquid in the container or the container is based on an input signal from the temperature detecting means. Control means having a container washing mode for washing the container separately from the normal mode consisting of a heat retaining operation for maintaining the liquid in the container at a predetermined temperature, wherein the control means is configured to receive the signal from the boiling detection means in the container washing mode. operating the heating means by energization controlling means to the detecting the boiling of the liquid in the container based on the input signal, the after boiling detected the energization control means, the soothing all rather before Symbol heating means boiling of the liquid the energization is shut off for a predetermined time, the arrangement for intermittently energizing control in continuously or a predetermined period after its <br/>, cleaning performance enhancing the cleaning efficiency of the container in the container washing mode uniform As well as, it is possible to improve the safety of the equipment to suppress the generation of steam.

【００４３】また、請求項２記載の発明によれば、温度
検知手段より入力する温度信号に基づき容器内の液体の
温度が所定温度幅以上低下することを検知する温度低下
検知手段と、沸騰検知手段からの入力信号に基づき前記
容器内の液体を沸騰させる通常モードとは別に前記容器
の洗浄を行う容器洗浄モードを有する制御手段を備え、
前記制御手段が、前記通常モードでは前記温度低下検知
手段からの入力信号に基づき前記沸騰検知手段で前記容
器内の液体の沸騰状態を再度検知し直すように制御し、
前記容器洗浄モードでは前記温度低下検知手段からの入
力信号に関わらず動作状態を継続する構成により、通常
モードでは水の追加を検知して沸騰検知をやり直すとと
もに、容器洗浄モードで液体の沸騰状態を維持している
ときに誤って温度低下を検知し動作状態が変化してしま
うのを防いで、安定した容器洗浄動作を実現することが
できる。According to the second aspect of the present invention, a temperature decrease detecting means for detecting that the temperature of the liquid in the container has decreased by a predetermined temperature range or more based on a temperature signal inputted from the temperature detecting means, and a boiling detection Control means having a container cleaning mode for cleaning the container separately from a normal mode for boiling the liquid in the container based on an input signal from the means,
The control means controls the boiling mode based on an input signal from the temperature decrease detection means in the normal mode so as to detect the boiling state of the liquid in the container again,
In the container cleaning mode, the operation state is continued irrespective of the input signal from the temperature decrease detection means.In the normal mode, the addition of water is detected and the boiling detection is performed again. While the temperature is maintained, it is possible to prevent a temperature drop from being erroneously detected and change the operation state, thereby realizing a stable container cleaning operation.

【００４４】また、請求項３記載の発明によれば、制御
手段が、容器洗浄モードでは沸騰検知手段からの入力信
号に基づき容器内の液体の沸騰状態を検知するまで通電
制御手段により加熱手段を動作させ、沸騰検知後は前記
通電制御手段により前記加熱手段を連続的または断続的
に通電制御させる構成にて、前記沸騰状態を検知するま
では温度低下検知手段からの入力信号に基づき前記沸騰
検知手段で前記容器内の液体の沸騰状態を再度検知し直
すように制御し、前記沸騰検知後は前記温度低下検知手
段からの入力信号に関わらず前記加熱手段の連続的また
は断続的な通電制御状態を継続することにより、容器洗
浄モードで液体を沸かしているときに新たに液体を容器
内に追加しても、水が沸騰していないのに誤って沸騰検
知してしまうのを防いで追加後の液体を精度よく沸騰さ
せることができる。According to the third aspect of the present invention, in the container washing mode, the control means controls the heating means by the power supply control means until the boiling state of the liquid in the container is detected based on an input signal from the boiling detection means. After the boiling is detected, the energization control means continuously or intermittently controls the energization of the heating means. Until the boiling state is detected, the boiling detection is performed based on an input signal from the temperature decrease detection means. Means for re-detecting the boiling state of the liquid in the container, and after the detection of the boiling state, a continuous or intermittent energization control state of the heating means regardless of an input signal from the temperature decrease detection means. By continuing the process, even if a new liquid is added to the container while the liquid is being boiled in the container cleaning mode, the boiling is detected erroneously even though the water is not boiling. The liquid after the addition in the stomach can be accurately boiling.

【００４５】また、請求項４記載の発明によれば、温度
検知手段より入力する温度信号に基づき容器内の液体の
温度が所定温度未満であることを検知する温度未達検知
手段を備えて、制御手段が、通常モードでは前記温度未
達検知手段からの入力信号に基づき保温動作から沸騰動
作に状態移行し、容器洗浄モードでは前記温度未達検知
手段からの入力信号に関わらず動作状態を継続する構成
により、容器洗浄動作が終了し機器に電源を投入したま
ま液体を容器外に全部排出しても、加熱手段の通電によ
り容器底部が過度に加熱されるのを防いで機器の安全性
を高めることができる。According to the fourth aspect of the present invention, there is provided a temperature non-reaching detecting means for detecting that the temperature of the liquid in the container is lower than a predetermined temperature based on a temperature signal inputted from the temperature detecting means, In the normal mode, the control means shifts from the warming operation to the boiling operation based on the input signal from the temperature unreached detection means, and in the container cleaning mode, continues the operation state regardless of the input signal from the temperature unreached detection means. With this configuration, even if the container cleaning operation is completed and the liquid is entirely drained out of the container while the power to the device is turned on, the container bottom can be prevented from being excessively heated by energizing the heating means, and the safety of the device can be reduced. Can be enhanced.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明の第１、第２、第３および第４の実施例
における電気湯沸かし器のブロック図FIG. 1 is a block diagram of an electric water heater according to first, second, third and fourth embodiments of the present invention.

【図２】本発明の第１の実施例における容器洗浄モード
の動作を示す図FIG. 2 is a diagram showing an operation in a container cleaning mode according to the first embodiment of the present invention.

【図３】本発明の第２の実施例における容器洗浄モード
での容器内の水および温度センサの温度変化を示す図FIG. 3 is a diagram showing temperature changes of water in a container and a temperature sensor in a container cleaning mode according to a second embodiment of the present invention.

【図４】本発明の第３の実施例における容器洗浄モード
の行程中に水を追加したときの動作を示す図FIG. 4 is a diagram illustrating an operation when water is added during a process of a container cleaning mode according to a third embodiment of the present invention.

【図５】従来例における電気湯沸かし器のブロック図FIG. 5 is a block diagram of an electric water heater in a conventional example.

【符号の説明】[Explanation of symbols]

１容器２加熱手段３通電制御手段４温度センサ５温度検知手段６沸騰検知手段７温度低下検知手段８温度未達検知手段９制御手段１０容器洗浄入力手段１１容器洗浄表示手段 DESCRIPTION OF SYMBOLS 1 Container 2 Heating means 3 Electricity control means 4 Temperature sensor 5 Temperature detecting means 6 Boiling detecting means 7 Temperature drop detecting means 8 Temperature unreached detecting means 9 Control means 10 Container cleaning input means 11 Container cleaning display means

───────────────────────────────────────────────────── フロントページの続き (72)発明者佐藤周史大阪府門真市大字門真1006番地松下電器産業株式会社内 (56)参考文献特開平９−201284（ＪＰ，Ａ) 特開平３−77510（ＪＰ，Ａ) 特開平３−114421（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) A47J 27/21 101 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shuji Sato 1006 Kazuma Kadoma, Kadoma City, Osaka Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-9-201284 (JP, A) JP-A-3 -77510 (JP, A) JP-A-3-114421 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 27/21 101

Claims

(57)【特許請求の範囲】(57) [Claims]

【請求項１】液体を収納する容器と、前記容器内の液
体を加熱および所定温度に維持する加熱手段と、前記加
熱手段の通電制御を行う通電制御手段と、温度センサを
介して前記容器内の液体の温度を間接的に検知する温度
検知手段と、前記温度検知手段より入力する温度信号に
基づき前記容器内の液体の沸騰状態を検知する沸騰検知
手段と、前記沸騰検知手段からの入力信号に基づき前記
容器内の液体を沸騰させる沸騰動作または前記温度検知
手段からの入力信号に基づき前記容器内の液体を所定温
度に維持する保温動作からなる通常モードと、前記通常
モードとは別に前記容器の洗浄を行う容器洗浄モードを
有する制御手段を備え、前記制御手段が、前記容器洗浄
モードでは前記沸騰検知手段からの入力信号に基づき前
記容器内の液体の沸騰状態を検知するまで前記通電制御
手段により前記加熱手段を動作させ、沸騰検知後は前記
通電制御手段により、前記液体の沸騰を鎮静化すべく前
記加熱手段の通電を所定時間だけ遮断し、その後連続的
または所定周期にて断続的に通電制御させる構成とした
電気湯沸かし器。A container for storing a liquid; a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature; an energization control unit for energizing the heating unit; Temperature detecting means for indirectly detecting the temperature of the liquid, a boiling detecting means for detecting a boiling state of the liquid in the container based on a temperature signal inputted from the temperature detecting means, and an input signal from the boiling detecting means A normal mode consisting of a boiling operation for boiling the liquid in the container based on the above or a heat retaining operation for maintaining the liquid in the container at a predetermined temperature based on an input signal from the temperature detecting means, and the container separately from the normal mode. A control unit having a container cleaning mode for cleaning the container, wherein the control unit controls the boiling of the liquid in the container based on an input signal from the boiling detection unit in the container cleaning mode. Until detection Teng state to operate the heating means by the energization control means, the after boiling detected the energization control means, the predetermined time energization before <br/> Symbol heating means rather soothing all the boiling of the liquid only cut off intermittently configuration and electrical water heaters for energizing controlled by continuously or a predetermined period after it.

【請求項２】液体を収納する容器と、前記容器内の液
体を加熱および所定温度に維持する加熱手段と、前記加
熱手段の通電制御を行う通電制御手段と、温度センサを
介して前記容器内の液体の温度を間接的に検知する温度
検知手段と、前記温度検知手段より入力する温度信号に
基づき前記容器内の液体の沸騰状態を検知する沸騰検知
手段と、前記温度検知手段より入力する温度信号に基づ
き前記容器内の液体の温度が所定温度幅以上低下するこ
とを検知する温度低下検知手段と、前記沸騰検知手段か
らの入力信号に基づき前記容器内の液体を沸騰させる通
常モードと、前記通常モードとは別に前記容器の洗浄を
行う容器洗浄モードを有する制御手段を備え、前記制御
手段が、前記通常モードでは前記温度低下検知手段から
の入力信号に基づき前記沸騰検知手段で前記容器内の液
体の沸騰状態を再度検知し直すように制御し、前記容器
洗浄モードでは前記温度低下検知手段からの入力信号に
関わらず動作状態を継続する構成とした電気湯沸かし
器。2. A container for accommodating a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, and the inside of the container via a temperature sensor. Temperature detecting means for indirectly detecting the temperature of the liquid, a boiling detecting means for detecting the boiling state of the liquid in the container based on a temperature signal input from the temperature detecting means, and a temperature input from the temperature detecting means. A temperature drop detecting means for detecting that the temperature of the liquid in the container is reduced by a predetermined temperature range or more based on a signal, a normal mode for boiling the liquid in the container based on an input signal from the boiling detecting means, Control means having a container cleaning mode for cleaning the container separately from the normal mode, wherein the control means is based on an input signal from the temperature decrease detection means in the normal mode. An electric water heater configured to control so that the boiling state of the liquid in the container is again detected by the boiling detection unit, and to continue the operation state in the container cleaning mode regardless of an input signal from the temperature decrease detection unit. .

【請求項３】液体を収納する容器と、前記容器内の液
体を加熱および所定温度に維持する加熱手段と、前記加
熱手段の通電制御を行う通電制御手段と、温度センサを
介して前記容器内の液体の温度を間接的に検知する温度
検知手段と、前記温度検知手段より入力する温度信号に
基づき前記容器内の液体の沸騰状態を検知する沸騰検知
手段と、前記温度検知手段より入力する温度信号に基づ
き前記容器内の液体の温度が所定温度幅以上低下するこ
とを検知する温度低下検知手段と、前記沸騰検知手段か
らの入力信号に基づき前記容器内の液体を沸騰させる通
常モードと、前記通常モードとは別に前記容器の洗浄を
行う容器洗浄モードを有する制御手段を備え、前記制御
手段が、前記容器洗浄モードでは前記沸騰検知手段から
の入力信号に基づき前記容器内の液体の沸騰状態を検知
するまで前記通電制御手段により前記加熱手段を動作さ
せ、沸騰検知後は前記通電制御手段により前記加熱手段
を連続的または断続的に通電制御させる構成において、
前記沸騰状態を検知するまでは前記温度低下検知手段か
らの入力信号に基づき前記沸騰検知手段で前記容器内の
液体の沸騰状態を再度検知し直すように制御し、前記沸
騰検知後は前記温度低下検知手段からの入力信号に関わ
らず前記加熱手段の連続的または断続的な通電制御状態
を継続するようにした電気湯沸かし器。3. A container for storing a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, and the inside of the container via a temperature sensor. Temperature detecting means for indirectly detecting the temperature of the liquid, boiling detecting means for detecting a boiling state of the liquid in the container based on a temperature signal inputted from the temperature detecting means, and a temperature inputted from the temperature detecting means. A temperature drop detection unit that detects that the temperature of the liquid in the container is reduced by a predetermined temperature range or more based on a signal; a normal mode in which the liquid in the container is boiled based on an input signal from the boiling detection unit; Control means having a container washing mode for washing the container separately from the normal mode, wherein the control means is based on an input signal from the boiling detection means in the container washing mode. In the configuration in which the heating means is operated by the energization control means until the boiling state of the liquid in the container is detected, and after the boiling detection, the heating means is continuously or intermittently energized by the energization control means.
Until the boiling state is detected, control is performed so that the boiling state of the liquid in the container is detected again by the boiling detection section based on an input signal from the temperature reduction detection section. An electric water heater configured to continue a continuous or intermittent energization control state of the heating means regardless of an input signal from the detection means.

【請求項４】液体を収納する容器と、前記容器内の液
体を加熱および所定温度に維持する加熱手段と、前記加
熱手段の通電制御を行う通電制御手段と、温度センサを
介して前記容器内の液体の温度を間接的に検知する温度
検知手段と、前記温度検知手段より入力する温度信号に
基づき前記容器内の液体の沸騰状態を検知する沸騰検知
手段と、前記温度検知手段より入力する温度信号に基づ
き前記容器内の液体の温度が所定温度未満であることを
検知する温度未達検知手段と、前記沸騰検知手段からの
入力信号に基づき前記容器内の液体を沸騰させる沸騰動
作および前記温度検知手段からの入力信号に基づき前記
容器内の液体を所定温度に維持させる保温動作からなる
通常モードと、前記通常モードとは別に前記容器の洗浄
を行う容器洗浄モードを有する制御手段を備え、前記制
御手段が、前記通常モードでは前記温度未達検知手段か
らの入力信号に基づき前記保温動作から前記沸騰動作に
状態移行し、前記容器洗浄モードでは前記温度未達検知
手段からの入力信号に関わらず動作状態を継続する構成
とした電気湯沸かし器。4. A container for accommodating a liquid, a heating unit for heating the liquid in the container and maintaining the liquid at a predetermined temperature, an energization control unit for controlling the energization of the heating unit, and the inside of the container via a temperature sensor. Temperature detecting means for indirectly detecting the temperature of the liquid, a boiling detecting means for detecting the boiling state of the liquid in the container based on a temperature signal input from the temperature detecting means, and a temperature input from the temperature detecting means. A temperature inadequate detection means for detecting that the temperature of the liquid in the container is lower than a predetermined temperature based on the signal, a boiling operation for boiling the liquid in the container based on an input signal from the boiling detection means, and the temperature A normal mode including a heat retaining operation for maintaining the liquid in the container at a predetermined temperature based on an input signal from the detection means, and a container cleaning mode for cleaning the container separately from the normal mode. Control means having a temperature mode, wherein the control means shifts from the warming operation to the boiling operation based on an input signal from the temperature unreached detection means in the normal mode, and the temperature unreached in the container cleaning mode. An electric water heater configured to continue its operation state regardless of an input signal from a detection means.